On 12/14/2014 09:48 PM, Tim Kryger wrote:
On Sat, Dec 13, 2014 at 11:22 PM, Bjorn Andersson <bjorn@xxxxxxx> wrote:
...
Or simply; what is vmmc (in the code) supposed to represent?
Hi Bjorn,
VMMC is the supply that delivers power out to the SD card itself (aka VDD).
It is not the internal power rail/power domain of the host controller
within the SoC.
I've seen this question come up quite a few times.
Should Documentation/devicetree/bindings/mmc/mmc.txt document the
vmmc/vqmmc regulators? I assume they're considered shared across all
MMC/SDHCI controller bindings?
Since that only covers DT, it might be nice to document vmmc-vs-vqmmc
somewhere else too, such as right by the devm_regulator_get_optional()
calls in mmc_regulator_get_supply() in drivers/mmc/core/core.c.
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